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Issue 1, 2001
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Integration of a wet analysis system on a glass chip: determination of Co(II) as 2-nitroso-1-naphthol chelates by solvent extraction and thermal lens microscopy

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Abstract

The integration of a wet analysis system on a glass chip was demonstrated and determination of Co(II) was performed using this system. The Co(II) was extracted into m-xylene from aqueous solution as 2-nitroso-1-naphthol chelates, and colorimetric determination of the m-xylene phase was applied by a thermal lens microscope. The integration of the chemical operation procedures shown here leads to a considerable reduction in analyzing time. The time for extraction in the integrated system, 10 min, was about tenfold shorter than a conventional system using a separatory funnel and mechanical shaker. Moreover, troublesome operations such as phase separation necessary for the conventional system could be omitted. The determination of Co(II) in the range 2 × 10−7–1 × 10−8 M, which was estimated to be 0.072–1.44 zmol, was achieved.

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Publication details

The article was received on 27 Mar 2001, accepted on 30 May 2001 and first published on 09 Aug 2001


Article type: Paper
DOI: 10.1039/B102790P
Citation: Lab Chip, 2001,1, 72-75
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    Integration of a wet analysis system on a glass chip: determination of Co(II) as 2-nitroso-1-naphthol chelates by solvent extraction and thermal lens microscopy

    T. Minagawa, M. Tokeshi and T. Kitamori, Lab Chip, 2001, 1, 72
    DOI: 10.1039/B102790P

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